package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;
import javax.swing.*;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    /**
     * 关联关系dao
     */
    @Resource
    AttrAttrgroupRelationDao relationDao;

    /**
     * attr分组dao
     */
    @Autowired
    private AttrGroupDao attrGroupDao;

    /**
     * 分类dao
     */
    @Autowired
    private CategoryDao categoryDao;

    /**
     * 分类service
     */
    @Autowired
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        // 1.保存商品属性基本数据
        this.save(attrEntity);
        // 2.保存关联关系
        // 如果当前页面type类型是1，才需要保存分组关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            // 属性分组id
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            // 属性id
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type", "base".equalsIgnoreCase(type) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() : ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());
        if (!StringUtils.isEmpty(catelogId)) {
            if (catelogId != 0) {
                queryWrapper.eq("catelog_id", catelogId);
            }
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );

        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            // 如果类型是base，才设置分组信息
            if ("base".equalsIgnoreCase(type)) {
                // 1.设置分类和分组的名字，使用分类和分组的id去进行查询
                // 先通过关联关系dao,使用属性id，查找到所属分组id
                AttrAttrgroupRelationEntity attrId = relationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                // 通过查找到的所属分组id，去查找所属分组的name
                if (null != attrId && !StringUtils.isEmpty(attrId.getAttrGroupId())) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
            // 通过所属分类的id查找到所属分类的名称
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (null != categoryEntity) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(respVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        // 根据属性id查找出对应的商品属性
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 1.设置分组信息
            // 根据attrId查询对应的分组
            AttrAttrgroupRelationEntity attrAttrgroupRelation = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
            if (null != attrAttrgroupRelation) {
                // 分类所属分组id
                attrRespVo.setAttrGroupId(attrAttrgroupRelation.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelation.getAttrGroupId());
                if (null != attrGroupEntity) {
                    // 当前分组对应的名称
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }


        // 2.设置分类信息
        Long[] catelogPath = categoryService.findCatelogPath(attrEntity.getCatelogId());
        // 分类所属完整路径
        attrRespVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
        if (null != categoryEntity) {
            // 对应分类的名称
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        return attrRespVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        // 修改基本数据
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);


        Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 如果根据当前属性id在属性&属性分组关联表中查询到数据，那么就是修改，否则就是新增
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());
            if (count > 0) {
                // 修改分组关联
                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            } else {
                relationDao.insert(relationEntity);
            }
        }
    }

    /**
     * 根据分组id查找关联的所有基本属性
     *
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> relationEntityList = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));

        List<Long> attrIds = null;
        if (relationEntityList.size() > 0 && relationEntityList != null) {
            attrIds = relationEntityList.stream().map((relationEntity) -> {
                return relationEntity.getAttrId();
            }).collect(Collectors.toList());
        }

        Collection<AttrEntity> attrEntities = null;
        if (attrIds != null && attrIds.size() > 0) {
            attrEntities = this.listByIds(attrIds);
        }

        return (List<AttrEntity>) attrEntities;
    }

    /**
     * 批量删除属性分组的关联关系
     *
     * @param vos
     */
    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        // relationDao.delete(new QueryWrapper<>().eq("attr_id", 1L).eq("attr_group_id", 1L));
        List<AttrAttrgroupRelationEntity> collect = Arrays.asList(vos).stream().map((attrGroupRelationVo) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(attrGroupRelationVo, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());

        relationDao.deleteBatchRelation(collect);
    }

    /**
     * 查询当前分组没有关联的所有属性
     *
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        // 1.当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        // 1.1）先根据当前分组的所属分类，查出当前分类的所有属性
        Long catelogId = attrGroupEntity.getCatelogId();
        // 1.2）在查出当前分类已经关联的所有属性

        // 2.当前分组只能关联别的分组没有引用的属性
        // 2.1）当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>()
                .eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map((item) -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());


        // 2.2）这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = null;
        if (collect != null && collect.size() > 0) {
            groupId = relationDao.selectList(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .in("attr_group_id", collect));
        }

        List<Long> attrIds = null;
        if (groupId != null && groupId.size() > 0) {
            attrIds = groupId.stream().map((item) -> {
                return item.getAttrId();
            }).collect(Collectors.toList());
        }
        // 2.3）从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId)
                .eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());

        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }


        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            wrapper.and((w) -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);
        PageUtils pageUtils = new PageUtils(page);
        return pageUtils;
    }

    /**
     * 在指定的所有属性集合里面,过滤出所有可以被检索的属性的id
     *
     * @param attrIds
     * @return
     */
    @Override
    public List<Long> selectSearchAttrIds(List<Long> attrIds) {
        List<Long> searchAttrIds = baseMapper.selectSearchAttrIds(attrIds);
        return searchAttrIds;
    }

}